EP0706990B1 - Verfahren zur Abtrennung eines (Meth)acrylsäuremonoesters eines C4-bis C6-Alkandiols aus einer einen (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols und das C4- C6-Alkandiol enthaltenden wässrigen Lösung - Google Patents
Verfahren zur Abtrennung eines (Meth)acrylsäuremonoesters eines C4-bis C6-Alkandiols aus einer einen (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols und das C4- C6-Alkandiol enthaltenden wässrigen Lösung Download PDFInfo
- Publication number
- EP0706990B1 EP0706990B1 EP95115503A EP95115503A EP0706990B1 EP 0706990 B1 EP0706990 B1 EP 0706990B1 EP 95115503 A EP95115503 A EP 95115503A EP 95115503 A EP95115503 A EP 95115503A EP 0706990 B1 EP0706990 B1 EP 0706990B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- meth
- acrylic acid
- alkanediol
- monoester
- acid monoester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 title claims description 32
- 238000000034 method Methods 0.000 title claims description 23
- 239000007864 aqueous solution Substances 0.000 title claims description 16
- 238000000926 separation method Methods 0.000 title claims description 11
- 238000000605 extraction Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 19
- 150000005690 diesters Chemical class 0.000 claims description 16
- 239000003960 organic solvent Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 230000032050 esterification Effects 0.000 claims description 12
- 238000005886 esterification reaction Methods 0.000 claims description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 8
- NDWUBGAGUCISDV-UHFFFAOYSA-N 4-hydroxybutyl prop-2-enoate Chemical compound OCCCCOC(=O)C=C NDWUBGAGUCISDV-UHFFFAOYSA-N 0.000 claims description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 239000008346 aqueous phase Substances 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- 125000004432 carbon atom Chemical group C* 0.000 claims description 5
- 150000001983 dialkylethers Chemical class 0.000 claims description 5
- 150000002148 esters Chemical class 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 4
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 4
- 150000007513 acids Chemical class 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- GJRQTCIYDGXPES-UHFFFAOYSA-N iso-butyl acetate Natural products CC(C)COC(C)=O GJRQTCIYDGXPES-UHFFFAOYSA-N 0.000 claims description 3
- FGKJLKRYENPLQH-UHFFFAOYSA-M isocaproate Chemical compound CC(C)CCC([O-])=O FGKJLKRYENPLQH-UHFFFAOYSA-M 0.000 claims description 3
- OQAGVSWESNCJJT-UHFFFAOYSA-N isovaleric acid methyl ester Natural products COC(=O)CC(C)C OQAGVSWESNCJJT-UHFFFAOYSA-N 0.000 claims description 3
- 238000010533 azeotropic distillation Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 235000019260 propionic acid Nutrition 0.000 claims description 2
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 2
- 239000006227 byproduct Substances 0.000 claims 1
- 238000002955 isolation Methods 0.000 claims 1
- 239000000047 product Substances 0.000 claims 1
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 40
- 239000012071 phase Substances 0.000 description 12
- 238000009835 boiling Methods 0.000 description 8
- 238000004821 distillation Methods 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 238000007086 side reaction Methods 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000012074 organic phase Substances 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- -1 alkane diol Chemical class 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UAEPNZWRGJTJPN-UHFFFAOYSA-N methylcyclohexane Chemical compound CC1CCCCC1 UAEPNZWRGJTJPN-UHFFFAOYSA-N 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- WJFKNYWRSNBZNX-UHFFFAOYSA-N 10H-phenothiazine Chemical compound C1=CC=C2NC3=CC=CC=C3SC2=C1 WJFKNYWRSNBZNX-UHFFFAOYSA-N 0.000 description 1
- JHWGFJBTMHEZME-UHFFFAOYSA-N 4-prop-2-enoyloxybutyl prop-2-enoate Chemical compound C=CC(=O)OCCCCOC(=O)C=C JHWGFJBTMHEZME-UHFFFAOYSA-N 0.000 description 1
- 238000006887 Ullmann reaction Methods 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 230000001476 alcoholic effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- NEHMKBQYUWJMIP-NJFSPNSNSA-N chloro(114C)methane Chemical compound [14CH3]Cl NEHMKBQYUWJMIP-NJFSPNSNSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 238000007700 distillative separation Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- KQNPFQTWMSNSAP-UHFFFAOYSA-M isobutyrate Chemical compound CC(C)C([O-])=O KQNPFQTWMSNSAP-UHFFFAOYSA-M 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- GYNNXHKOJHMOHS-UHFFFAOYSA-N methyl-cycloheptane Natural products CC1CCCCCC1 GYNNXHKOJHMOHS-UHFFFAOYSA-N 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- NWVVVBRKAWDGAB-UHFFFAOYSA-N p-methoxyphenol Chemical compound COC1=CC=C(O)C=C1 NWVVVBRKAWDGAB-UHFFFAOYSA-N 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- SNOOUWRIMMFWNE-UHFFFAOYSA-M sodium;6-[(3,4,5-trimethoxybenzoyl)amino]hexanoate Chemical compound [Na+].COC1=CC(C(=O)NCCCCCC([O-])=O)=CC(OC)=C1OC SNOOUWRIMMFWNE-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000002110 toxicologic effect Effects 0.000 description 1
- 231100000027 toxicology Toxicity 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/48—Separation; Purification; Stabilisation; Use of additives
- C07C67/58—Separation; Purification; Stabilisation; Use of additives by liquid-liquid treatment
Definitions
- the present invention relates to a process for separating a (meth) acrylic acid monoester of a C 4 to C 6 alkanediol from an aqueous one containing a (meth) acrylic acid monoester of a C 4 to C 6 alkanedicl and the C 4 to C 6 alkanediol Solution by extraction with an organic solvent.
- (Meth) acrylic acid is used as an abbreviation and stands for acrylic acid or methacrylic acid.
- Extractant can act as entraining agents aliphatic and cycloaliphatic hydrocarbons with a boiling point of 65 to 120 ° C (at 1 atm) like hexane, Heptane, cyclohexane or methylcyclohexane, with cyclohexane in particular is preferred.
- the aqueous phase falls an aqueous solution consisting essentially of water, Alkanediol and the (meth) acrylic acid monoester of alkanediol as desired product of value exists.
- DE-PS 15 18 572 proposes a solution to the problem, the monoester from the aqueous solution by extraction with a suitable organic Separate solvent and then this extractant to remove by distillation.
- Extracting agent is explicitly exclusively in DE-PS 15 18 572 Methylene chloride listed.
- EP-A 465 853 recommends esterification in the presence of substantial amounts of preformed diester added to ensure that the share of unconverted Minimize alkane diol in the product mixture. Furthermore recommends the EP-A 465 853 from the product mixture the catalytically active Wash out acid, then the diester compound in the absence of water with appropriate extraction agents, as they do DE-PS 15 18 572 recommends extracting directly and at this way of extraction into the extractant Wash the monoester with water afterwards and the resulting aqueous phase with that of monoester Combine extraction phase and the diester in the esterification attributed. Regarding the aqueous, monoesters and small amounts of phase containing alkanediol will only recommended to separate the low-boiling components by distillation.
- the object of the present invention was therefore to provide a process for separating a (meth) acrylic monoester of a C 4 to C 6 alkanediol from a one (meth) acrylic monoester of a C 4 to C 6 alkanediol and the C 4 to C To provide 6 -alkanediol-containing aqueous solution by extraction with an organic solvent different from methylene chloride, the extractive effect of which is essentially the same as that of methylene chloride, but has a reduced risk potential.
- a method for separating a (meth) acrylic acid monoester of a C 4 to C 6 alkanediol from an aqueous solution containing a (meth) acrylic acid monoester of a C 4 to C 6 alkanediol and the C 4 to C 6 alkanediol has been carried out Extraction with an organic solvent found, which is characterized in that an organic solvent from the group comprising esters from C 1 - to C 4 -alkanecarboxylic acids and C 1 - to C 5 -alkanols, simple and mixed dialkyl ethers, the 4 to Have 8 carbon atoms, and mixtures of the organic solvents mentioned, is used.
- Preferred extractants according to the invention are esters of acetic acid or propionic acid and C 3 -C 5 -alkanols, in particular C 4 -alkanols, in particular iso-butyl acetate. Also particularly suitable are dialkyl ethers which have 4 to 6 carbon atoms, in particular the ether from methanol and tert-butanol. Furthermore, mixtures of the aforementioned organic solvents are suitable as the extracting agent according to the invention.
- the extractants to be used according to the invention are thereby excellent that their boiling point at normal pressure (in the Rule ⁇ 150 ° C) of that of the extractive (Meth) acrylic acid monoester is sufficiently different, which is a subsequent simple distillative separation of the organic extractant guaranteed.
- their extractive action compared to the (meth) acrylic acid monoesters to be absorbed corresponds essentially to that of methylene chloride. That is, provided that identical volumes of extractant are used, they are capable of absorbing essentially the same equilibrium amount of monoesters as methylene chloride when brought into contact with an aqueous solution containing (meth) acrylic acid monoester of a C 4 -C 6 -alkanediol at 25 ° C. .
- Another advantageous property of the process according to the invention is that the extractants to be used according to the invention are able to select to a comparable extent between the C 4 - to C 6 -alkanediol and its (meth) acrylic acid monoester to a degree comparable to that of methylene chloride.
- solubility of the extractants to be used according to the invention is also in water with the corresponding solubility similarly low of methyl chloride, which is the transition of extractant in the water-containing solution minimized.
- the process according to the invention is particularly suitable for the extractive separation of the (meth) acrylic acid monoesters of a C 4 -C 6 -alkanediol from such aforementioned solutions.
- the process according to the invention is also suitable for the extractive separation of (meth) acrylic acid monoesters of a C 4 -C 6 -alkanediol from a solution containing water and C 4 -C 6 -alkanediol in addition to the aforementioned monoesters, as described in the context of the production process for (meth) acrylic acid monoesters of C 4 - to C 6 -alkanediols according to EP-A 465 853.
- the method according to the invention is used in a Temperature from 10 to 60 ° C, preferably from 20 to 40 ° C, particularly preferably run from 20 to 30 ° C. With increasing temperature the likelihood of side reactions increases.
- the Heat tone in the course of the extraction according to the invention is from of minor importance.
- Extraction at normal pressure (1 atm) applied. she can but also used at high pressure (up to 15 atm working pressure) will.
- the extraction according to the invention can surprisingly both in the case of an acidic, a neutral or a basic aqueous starting solution can be used without significant There were losses in the extractant according to the invention, although the same e.g. against hydrolysis or the like Side reactions are sensitive.
- the aqueous starting solution is used in the context of Contain esterification used catalytic acid. A part the same will also pass into the organic extraction phase and in the same with separation of the extractant by distillation remain. Interfere with such acid impurities in the desired way (Meth) acrylic acid monoesters, they can e.g. with water or aqueous base are washed out.
- the conventional extraction devices are suitable for carrying out the extraction according to the invention.
- the extractant and aqueous solution are preferably conducted in countercurrent, the specifically heavier phase advantageously being introduced at the top of the column.
- the process step according to the invention is carried out on the way to the (meth) acrylic acid monoester of a C 4 -C 6 -alkanediol in the presence of customary amounts of customary polymerization inhibitors.
- Particularly suitable polymerization inhibitors to be used in this way are phenothiazine, hydroquinone and hydroquinone monomethyl ether.
- Extractant EW S LE LW Sdp Methylene chloride 100 97/3 2nd 0.14 40.2 Methyl tert-butyl ether 95 92/8 4.8 1.1 55.2 iso-butyl acetate 100 97/3 0.7 1.6 118 n-butyl acetate 98 95/5 0.7 1.4 126.5
- Ethyl acetate 95 92/8 7.9 3.0 77.2
- Methyl propionate 93 90/10 0.5 - 79.1 Toluene (comparative example) 51 98/2 0.005 0.05 110.6
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Extraction Or Liquid Replacement (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
- Schleppmittel,
- Alkandiol,
- Monoester und
- Diester
- die Siedepunkte von Alkandiol, Monoester und Diester selbst unter reduziertem Druck bei erhöhten Temperaturen liegen;
- die Siedepunkte von Alkandiol, Monoester und Diester sehr nahe beieinander liegen;
- die vinylisch ungesättigten Monoester und Diester insbesondere in kondensierter Phase und bei erhöhter Temperatur eine erhöhte Polymerisationsneigung aufweisen.
- 1,4-Butandiol: 230°C (Römpp Chemie Lexikon, 9. Auflage, Thieme Verlag, Stuttgart, 1989);
- 1,4-Butandiolmonoacrylat: ca. 230°C (Technische Information TI/ED 1331 d aus 1987, der BASF Aktiengesellschaft);
- 1,4-Butandioldiacrylat: ca. 225°C (Ullmanns Encyklopädie der technischen Chemie, Bd. 19, Verlag Chemie, Weinheim, 1980, S. 9).
- > 0 bis 15 Gew.-% C4- bis C6-Alkandiol,
- > 0 bis 15 Gew.-% (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols,
- bis zu 3 Gew.-% sonstige Verbindungen (z.B. (Meth)acrylsäure, katalytische Säure, Diester, Polymerisationsinhibitor, etc.) und
- als Restmenge Wasser.
- 6 Gew.-% 1,4-Butandiol,
- 8 Gew.-% 1,4-Butandiolmonoacrylat,
- < 3 Gew.-% sonstige Verbindungen und
- als Restmenge Wasser
- a) die Löslichkeit des Extraktionsmittels in der wäßrigen Phase (LE, Angabe in Gew.-% bezogen auf die wäßrige Phase);
- b) die Löslichkeit von Wasser in der organischen Phase (LW, Angaben in Gew.-% bezogen auf die organische Phase);
- c) die extraktive Wirkung gegenüber 1,4-Butandiolmonoacrylat, wobei der extraktiven Wirkung (der im Methylenchlorid gelösten Menge an 1,4-Butandiolmonoacrylat) von Methylenchlorid willkürlich der Wert 100 zugeordnet wurde (EW);
- d) die Selektivität des Extraktionsmittels (S); zur Ermittlung von S wurde die im Extraktionsgleichgewicht befindliche organische Phase gaschromatographisch analysiert und in einfacher Weise das Gewichtsverhältnis der 1,4-Butandiolmonoacrylat (Zähler) sowie 1,4-Butandiol (Nenner) zuzuordnenden Flächenpeaks als Maß für S gebildet.
| Extraktionsmittel | EW | S | LE | LW | Sdp |
| Methylenchlorid | 100 | 97/3 | 2 | 0,14 | 40,2 |
| Methyl-tert.-butylether | 95 | 92/8 | 4,8 | 1,1 | 55,2 |
| iso-Butylacetat | 100 | 97/3 | 0,7 | 1,6 | 118 |
| n-Butylacetat | 98 | 95/5 | 0,7 | 1,4 | 126,5 |
| Ethylacetat | 95 | 92/8 | 7,9 | 3,0 | 77,2 |
| Methylpropionat | 93 | 90/10 | 0,5 | - | 79,1 |
| Toluol (Vergleichsbsp.) | 51 | 98/2 | 0,005 | 0,05 | 110,6 |
Claims (10)
- Verfahren zum Abtrennen eines (Meth)acrylsäuremonoesters eines C4- bis C6-Alkandiols aus einer einen (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols und das C4- bis C6-Alkandiol enthaltenden wäßrigen Lösung durch Extraktion mit einem organischen Lösungsmittel, dadurch gekennzeichnet, daß als Extraktionsmittel ein organisches Lösungsmittel aus der Gruppe umfassend Ester aus C1- bis C4-Alkancarbonsäuren und C1- bis C5-Alkanolen, einfache und gemischte Dialkylether, die 4 bis 8 C-Atome aufweisen, und Gemische aus solchen organischen Lösungsmitteln, verwendet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß als Extraktionsmittel ein organisches Lösungsmittel aus der Gruppe umfassend Ester aus Essigsäure oder Propionsäure und C3- bis C5-Alkanolen, einfache und gemischte Dialkylether, die 4 bis 6 C-Atome aufweisen, sowie Gemische der genannten organischen Lösungsmittel, verwendet wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Extraktionsmittel iso-Butylacetat, Methyl-tert.-butylether oder ein Gemisch der beiden vorgenannten organischen Lösungsmittel verwendet wird.
- Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß 1,4-Butandiol oder 1,6-Hexandiol oder deren Gemisch das Alkandiol bilden.
- Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß der abzutrennende (Meth)acrylsäuremonoester der Acrylsäuremonoester von 1,4-Butandiol, 1,6-Hexandiol oder von einem Gemisch dieser beiden Alkandiole ist.
- Verfahren nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß es bei einer Temperatur von 10 bis 60°C durchgeführt wird.
- Verfahren nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß es bei einer Temperatur von 20 bis 30°C durchgeführt wird.
- Verfahren nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß die wäßrige Lösung enthält:> 0 bis 15 Gew.-% C4- bis C6-Alkandiol,> 0 bis 15 Gew.-% (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols,bis zu 3 Gew.-% sonstige Verbindungen undals Restmenge Wasser.
- Verfahren nach Anspruch 1 bis 8, dadurch gekennzeichnet, daß die wäßrige Lösung enthält:> 0 bis 15 Gew.-% 1,4 Butandiol,> 0 bis 15 Gew.-% 1,4-Butandiolmonoacrylat,bis zu 3 Gew.-% sonstige Verbindungen undals Restmenge Wasser.
- Verfahren zur Herstellung eines (Meth)acrylsäuremonoesters eines C4- bis C6-Alkandiols durch Veresterung der (Meth)acrylsäure mit jenen Alkandiolen in Gegenwart saurer Veresterungskatalysatoren unter Entfernung des entstehenden Wassers durch azeotrope Destillation mit einem Schleppmittel, extraktive Auftrennung des Produktgemisches in eine den als Nebenprodukt entstehenden Diester enthaltende organische Lösung sowie eine verwendetes Alkandiol und (Meth)acrylsäuremonoester enthaltende wäßrige Lösung und anschließende extraktive Abtrennung des (Meth)acrylsäuremonoester aus der verwendetes Alkandiol und (Meth)acrylsäuremoncester enthaltenden wäßrigen Lösung mit einem Extraktionsmittel sowie nachfolgende Trennung von Extraktionsmittel und (Meth)acrylsäuremonoester, dadurch gekennzeichnet, daß als Extraktionsmittel für die Extraktion des (Meth)acrylsäuremonoesters aus der wäßrigen Phase ein organisches Lösungsmittel aus der Gruppe umfassend Ester aus C1- bis C4-Alkancarbonsäuren und C1- bis C5-Alkanolen, einfache und gemischte Dialkylether, die 4 bis 8 C-Atome aufweisen, und Gemische aus solchen organischen Lösungsmitteln, verwendet wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4436245A DE4436245A1 (de) | 1994-10-11 | 1994-10-11 | Verfahren zur Abtrennung eines (Meth)acrylsäuremonoesters eines C¶4¶- bis C¶6¶-Alkandiols aus einer einen (Meth)acrylsäuremonoester eines C¶4¶- bis C¶6¶-Alkandiols und das C¶4¶- C¶6¶-Alkandiol enthaltenden wäßrigen Lösung |
| DE4436245 | 1994-10-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0706990A1 EP0706990A1 (de) | 1996-04-17 |
| EP0706990B1 true EP0706990B1 (de) | 1998-08-19 |
Family
ID=6530443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95115503A Expired - Lifetime EP0706990B1 (de) | 1994-10-11 | 1995-09-30 | Verfahren zur Abtrennung eines (Meth)acrylsäuremonoesters eines C4-bis C6-Alkandiols aus einer einen (Meth)acrylsäuremonoester eines C4- bis C6-Alkandiols und das C4- C6-Alkandiol enthaltenden wässrigen Lösung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5618971A (de) |
| EP (1) | EP0706990B1 (de) |
| JP (1) | JP3834081B2 (de) |
| DE (2) | DE4436245A1 (de) |
| DK (1) | DK0706990T3 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10007213A1 (de) * | 2000-02-17 | 2001-08-23 | Basf Ag | Verfahren zur Herstellung von Estern alpha,beta-ungesättigter Carbonsäuren |
| WO2021214144A1 (en) * | 2020-04-22 | 2021-10-28 | Dsm Ip Assets B.V. | Process for the preparation of alpha,omega-alkanediol mononitrate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA630187A (en) * | 1961-10-31 | Union Carbide Corporation | Process for separation of esters of acrylic acids from alcohols | |
| US3162677A (en) * | 1962-06-20 | 1964-12-22 | Dow Chemical Co | Purification of glycol esters |
| DE1518572A1 (de) | 1965-07-20 | 1969-01-30 | Basf Ag | Verfahren zur kontinuierlichen Herstellung von Monoestern zweiwertiger Alkohole |
| JP2884433B2 (ja) | 1990-07-11 | 1999-04-19 | 三菱レイヨン株式会社 | 4―ヒドロキシブチルアクリレート又はメタクリレートの製造法 |
| DE4228397A1 (de) | 1992-08-26 | 1994-03-03 | Roehm Gmbh | Verfahren zur Herstellung von Hydroxyalkyl(meth)acrylsäureestern |
-
1994
- 1994-10-11 DE DE4436245A patent/DE4436245A1/de not_active Withdrawn
-
1995
- 1995-09-30 DK DK95115503T patent/DK0706990T3/da active
- 1995-09-30 DE DE59503252T patent/DE59503252D1/de not_active Expired - Fee Related
- 1995-09-30 EP EP95115503A patent/EP0706990B1/de not_active Expired - Lifetime
- 1995-10-05 US US08/539,771 patent/US5618971A/en not_active Expired - Fee Related
- 1995-10-11 JP JP26306095A patent/JP3834081B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5618971A (en) | 1997-04-08 |
| EP0706990A1 (de) | 1996-04-17 |
| JPH08188556A (ja) | 1996-07-23 |
| DK0706990T3 (da) | 1999-02-08 |
| DE59503252D1 (de) | 1998-09-24 |
| JP3834081B2 (ja) | 2006-10-18 |
| DE4436245A1 (de) | 1996-04-18 |
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